南方医科大学学报 ›› 2026, Vol. 46 ›› Issue (10): 2357-2371.doi: 10.12122/j.issn.1673-4254.2026.10.06

• • 上一篇    

早发型帕金森病相关基因Ddx56维持斑马鱼神经发育及抗凋亡的实验研究

许茜(), 刘尔祺, 张巧凤, 刘海鑫, 林新培, 林瑶()   

  1. 福建中医药大学中西医结合学院//中西医结合研究院,福建 福州 350122
  • 收稿日期:2025-12-23 出版日期:2026-10-20 发布日期:2026-10-26
  • 通讯作者: 林瑶 E-mail:xmuxuqian@163.com;55380098@qq.com
  • 作者简介:许 茜,博士,教授,博士生导师,E-mail: xmuxuqian@163.com
  • 基金资助:
    福建省自然科学基金(2024J01123);福建省自然科学基金(2024J01745);福建省科技创新联合资金项目(2024Y9485)

Role of Ddx56 gene associated with early-onset Parkinson disease in maintaining neural development and protecting against dopaminergic neuron apoptosis in zebrafish

Qian XU(), Erqi LIU, Qiaofeng ZHANG, Haixin LIU, Xinpei LIN, Yao LIN()   

  1. College of Integrative Medicine, Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
  • Received:2025-12-23 Online:2026-10-20 Published:2026-10-26
  • Contact: Yao LIN E-mail:xmuxuqian@163.com;55380098@qq.com

摘要:

目的 通过对课题组前期筛查的与早发型帕金森病(PD)发病相关的候选基因的体内与体外功能验证,探讨目标基因在生命发育早期阶段对多巴胺神经元存活的影响。 方法 通过原位杂交和荧光定量PCR检测野生型AB品系斑马鱼Ddx56、Galnt13两个候选基因的时序表达和组织特异性分布、检测Ddx56、Galnt13基因敲降斑马鱼模型中PD及多巴胺神经元相关基因表达情况,筛选出影响表型权重更大的Ddx56基因,进一步构建Ddx56干扰及过表达慢病毒载体并转染SH-SY5Y细胞,通过流式细胞仪检测各组细胞凋亡率,RNA-seq检测Ddx56敲降引起的基因变化差异,鉴定Ddx56基因在神经系统早期发育中的作用。 结果 Ddx56及Galnt13均在胚胎早期广泛表达,其中Ddx56主要在脑、精巢中高表达,Galnt13主要在脑、眼中高表达;Ddx56敲低时,PD相关基因Sncga、Sncgb、Polg、Pink1、Parkin、Lrrk2、Gba、Sncb基因表达显著改变(P<0.05);Galnt13敲低时,PD相关基因Sncgb、Syn2b、Lrrk2基因表达差异显著(P<0.05);Ddx56敲降组细胞凋亡比例增高(P<0.05),Ddx56敲降引起的差异基因变化主要集中在免疫系统、能量代谢、蛋白翻译、信号转导等方面,尤其在核糖体和代谢通路方面,差异表达的基因均不少于20个;差异表达基因与PD、亨廷顿氏病、阿尔茨海默症等神经退行性疾病有显著关联,并改变了体内氧化磷酸化水平。 结论 Ddx56基因在胚胎发育早期及脑部高表达,敲降后能引起PD及多巴胺神经元相关基因表达变化并引起多巴胺神经元凋亡,可能作为PD预测及早期诊断的生物标记物。

关键词: 帕金森病, 早发型, Ddx56, 斑马鱼, 神经发育, 细胞凋亡

Abstract:

Objective To investigate the role of Ddx56 and Galnt13 associated with the pathogenesis of early-onset Parkinson disease (PD) in maintaining survival of dopaminergic (DA) neurons during early development of zebrafish. Methods In situ hybridization and qPCR were used to detect the temporal expression and tissue-specific distribution of Ddx56 and Galnt13 in AB zebrafish, and the changes in expressions of PD- and DA neuron-associated genes following Ddx56 or Galnt13 knockdown were detected. In SH-SY5Y cells, effects of Ddx56 knockdown and overexpression on cell apoptosis were analyzed using flow cytometry. RNA-seq technique was used to investigate the changes in gene expression profiles following Ddx56 knockdown to explore the role of Ddx56 in early development of the nervous system. Results Both Ddx56 and Galnt13 were extensively expressed in early zebrafish embryos. Ddx56 was highly expressed predominantly in the brain and testis, and Galnt13 in the brain and eye of the zebrafish. Ddx56 knockdown resulted in significant changes in expressions of the PD-related genes Sncga, Sncgb, Polg, Pink1, Parkin, Lrrk2, Gba, and Sncb, while Galnt13 knockdown affected the expressions of Sncgb, Syn2b, and Lrrk2. Ddx56 knockdown caused a significant increase of apoptosis in SH-SY5Y cells and differential expressions of an array of genes, which were enriched mainly in the immune system, energy metabolism, protein translation, and signal transduction; no fewer than 20 genes in the ribosome pathway and the metabolic pathway each, in particular, showed differential expressions following Ddx56 knockdown. These differentially expressed genes were significantly associated with neurodegenerative diseases, and their alterations resulted in changes in the level of oxidative phosphorylation. Conclusion Ddx56 is highly expressed in the brain during early development of zebrafish. Ddx56 knockdown causes changes in PD- and DA-associated genes and induces apoptosis of DA neurons, suggesting its potential as a biomarker for early diagnosis of PD.

Key words: Parkinson's disease, early-onset, Ddx56, zebrafish, nervous system development, cell apoptosis